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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Greenback stingaree ： ウィキペディア英語版 Greenback stingaree The greenback stingaree (''Urolophus viridis'') is a little-known species of stingray in the family Urolophidae, endemic to the outer continental shelf and upper continental slope off southeastern Australia. Growing to a length of , this species has a diamond-shaped pectoral fin disc wider than long and uniformly light green in color above. Between its nostrils is a skirt-shaped curtain of skin. Its tail bears skin folds on either side and a deep, lanceolate caudal fin, but lacks a dorsal fin. Usually found over soft substrates at a depth of , the greenback stingaree is a predator of polychaete worms and crustaceans. It is aplacental viviparous, with developing embryos are sustained by maternally produced histotroph ("uterine milk"). Females bear litters of 1–3 pups annually after a 10–12 month gestation period. Substantial numbers of greenback stingarees are caught incidentally in trawls; captured rays rarely survive and also tend to abort their young. Stingaree populations on the New South Wales upper slope, presumably including this species, have declined precipitously as a result of commercial fishing. Consequently, the International Union for Conservation of Nature (IUCN) has listed the greenback stingaree as Vulnerable. ==Taxonomy== The greenback stingaree was described by Australian ichthyologist Alan Riverstone McCulloch in an 1916 volume of the scientific journal ''Biological Results Endeavour'', who gave it the specific epithet ''viridis'' from the Latin word for "green". The type specimen was collected from a depth of off Green Cape in New South Wales, by the research vessel FIS ''Endeavour''. An undescribed stingaree possibly belonging to this species has also been found in deep water off southwestern Australia; it is very similar to the greenback stingaree but has more pectoral fin rays (106–107 versus under 100).〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Greenback stingaree」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.